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      <td align="left"><img src="cdflogo.jpeg" alt="CDF Logo" align="middle" height="60"> </td>
      <td align="center" bgcolor="beige"><font size="6"face="Arial"><b> 
         Search for a SM Higgs Boson with the Diphoton Final State at CDF 
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               Simulation of Higgs Boson Diphoton Mass Spectrum
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               <p align="justify">    
                  Simulation of the diphoton mass spectrum for a Higgs boson with a mass of 120 GeV/c<sup>2</sup> 
    	          decaying into two photons. The mass resolution of the diphoton channel is extremely good compared to 
	          dijet decay modes (Gaussian sigma / mean < 3 % ).
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               &nbsp;
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                  <img border="0" src="DiPhoMassCC_MassResolution.gif" width="478">
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               <b>
	          <a href="DiPhoMassCC_MassResolution.eps">.eps</a>
		  &nbsp;&nbsp;
                  <a title="Full-size .gif plot" href="DiPhoMassCC_MassResolution.gif">.gif</a>
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	       Signal Acceptance
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                  Central diphoton signal acceptance, in percent, for each signal process and mass point generated.    
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               &nbsp;
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                  <img border="0" src="AcceptanceTablesCC.gif" width="400">
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               <b>
	          <a href="AcceptanceTablesCC.ps">.ps</a>
		  &nbsp;&nbsp;
                  <a title="Full-size .gif plot" href="AcceptanceTablesCC.tex">.tex</a>
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	       Smooth Fit Serves as Background Model
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                  No significant narrow resonance is observed in the data. A smooth fit is made to 
	          the diphoton invariant mass distribution of the data using 
                  sidebands for each Higgs test mass and then interpolating to the signal region 
	          of that test mass. The fit in the signal region is used to 
                  establish the background expectation. The data vs. fit residual is shown for a 
		  Higgs test mass of 120 GeV/c<sup>2</sup>.
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               &nbsp;
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                  <img border="0" src="FullFitOnDataAndResidual_cc_SM_5.4fb_120.gif" width="598">
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               <b>
	          <a href="FullFitOnDataAndResidual_cc_SM_5.4fb_120.eps">.eps</a>
		  &nbsp;&nbsp;
                  <a title="Full-size .gif plot" href="FullFitOnDataAndResidual_cc_SM_5.4fb_120.gif">.gif</a>
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	       Expected and Observed Limits Relative to Standard Model Prediction
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                  95% C.L. upper limits are set on the production cross section times branching fraction relative to the standard model 
                  prediction using a Bayesian binned likelihood approach.
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               &nbsp;
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                  <img border="0" src="limits_obs.gif" width="598">
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               <b>
	          <a href="limits_obs.eps">.eps</a>
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                  <a title="Full-size .gif plot" href="limits_obs.gif">.gif</a>
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                  <img border="0" src="sigma_limit_table_public.gif" width="450"></th>
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               <b>
	          <a href="sigma_limit_table_public.ps">.ps</a>
		  &nbsp;&nbsp;
                  <a title="Full-size .gif plot" href="sigma_limit_table_public.tex">.tex</a>
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	       Diphoton Invariant Mass Distribution</font>
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                  Invariant mass distribution of the data compared to the background model with a Higgs 
	          signal of 120 GeV/c<sup>2</sup> scaled to both its expected and observed limits.
               </p>    
               &nbsp;
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               <b>
	          <a href="StackCC_120.eps">.eps</a>
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                  <a title="Full-size .gif plot" href="StackCC_120.gif">.gif</a>
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	       <a href="additional_plots.html"><font color="#336666">Additional plots</font></a>
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	 Paged prepared by Karen Bland <br>
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